219:3*5=365 искомое число
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Вариант 1.
1. 5/15, 10/15, 3/15, 9/15, 12/15.
2. 3/6 = 1/2 и 8/16 = 1/2 и 8/12 = 2/3 и 42n/49n = 6/7
3. (26 -14 + 16)/8 = 28/8 = 3 1/2
Вариант 2.
1. 12/18, 3/18, 12/18, 10/18, 14/18
2. 1/2, 3/4, 1/2, 2/3
3. (26 - 13 - 4)/6 = 9/6 = 1 1/2
1) 11; 17; 19; 71; 77; 79; 91; 97; 99
2) 17+19=36
3) 91-71=20; 79-19=60; 97-17=80
4) 11+19=30; 71+11=88; 19+71=90